Nov 11, 2009 11:00pm EST
investigating. >> my understanding was that it was two vehicles owned by the united states secret service. one was a sedan and one an suv. secret service personnel were operating the vehicle. they had no protectee, such as the vice. or president. none of them were in the vehicle. >> reporter: the secret service says the cars were being driven from andrews to a garage in the cy. ey had just returned from the vice president's trip to fort lewis in washington state. park police investigators say they know who was struck and killed here, but have not been able to locate any of his relatives. sergeant david slaucher is a spokesperson for police. >> we're identifying him as an adult male. as far as what he was doing out at this hour and on the suitland parkway, we're looking into that as part of the overall investigation. >> reporter: in the light of day you can see where this happened. he says the secret service cars were westbound on suitland parkway. the pedestrian was crossing the parkway here at naler road just as this woman was doing this afternoon.